transmission swap

[newbe40]

Ok after looking at swaping a 91 5sp trans into my 95 240se 5sp I have a few questions, the 95 trans has a crank sensor in the bellhousing and the 91 does not after looking at the fsm the crank sensor is only used for detecting missfire so swaping the bellhousing for the crank sensor is an option any thoughts on that would be great.are there any problems with going from a abs trans to non abs like tailshaft length or yolk?also it would be nice to go through this 91 trans any help with parts bearings and small parts, synchros maybe a kit or something.

[s13sr20chris]

swapping belhousings should be a piece of cake. i dont know specifically of any differences between the abs and non abs tailshaft housing or driveshaft yoke. for rebuilding a trans you cant get any kit from nissan. you just go part by part. you would need bearings, sychronizers, blocker rings, and whatever you find that looks broke. check aftermarket parts stores for overhaul kits.

[newbe40]

Thanks for the help, so from what you are saying swapping the bellhousings would be worth the trouble and as far as the trans rebuild goes just go for bearings and synchros, block rings and look for worn out parts? Would you say it's worth the trouble going through the trans if it's working but has 180,000 miles I am planning a turbo setup with about 270- 300 hp the trans seems to be very noisy and has allot of vibraition coming through the shifter when running high rmps shifting seems good but 1st to 2nd seems like the synchros are worn or maybe that's just the way these trans are.

[s13sr20chris]

if it bothers you then yes rebuild it. just know that it is a fair bit of work. the trans should handle your power goals no prob. will it do it quietly and smoothely is another question.

[gumby]

im using the old ???k transmission with new clutch to save myself from separated another 143k set. just wondering how much a shop should charge to install a newer one assuming i can find one after i fry this clutch. also i managed rest the slave cylinder on the engine cross member while removing it. doesnt look noticably bent but how can i tell if its damaged visually. are those things sturdy enough to take that sort of abuse.

[s13sr20chris]

what?

[NISTECH]

I dont know that the 95 and 91 trans are the same trans, you dont simply have a bell housing on a manual trans it would be the entir front half case of the transmission.

[newbe40]

I know I have seen people post about swapping transmissions from different years and a trans guy I talk to said swapping the bellhousings isn't that hard I just don't know if it would be worth the trouble or should I just stick to swapping in another used one ? maybe 150.00 for a used trans vs 300.00 to 700.00 for a rebuild.

[NISTECH]

heres the deal, on automatic trannies you have a peice mounted infront of the main body of the trans, that is called a bell housing. On a manual trans you have a 2 peice case 1 peice houses the rear portion of the trans usually reverse and fifth gear are in that portion of the case. The other half of the case houses most of the gears 1st thru 4th that is both the main shaft and the counter shaft as well as the shift rods and the front bearing plate. If all your bolts on your front bearing plate are in the same location and the rods meet up in the exact same place on the case you can swap the trans front case, but when you do you need to measure end play on both the counter shaft and the main shaft and install the proper shims at the front bearing plate.

[s13sr20chris]

yeah, nistech is right about the measurements. i never do them and i get away with it but i should make the proper adjustments. i also should have made the clarification about the bellhousings. they are a 2 piece case so it is not a traditional bellhousing. its the whole front case half. yes, the whole front case halves are swappable between all the dohc ka manual transmissions. when you do it, dont let any little parts fall out.

[newbe40]

Thanks thats the info I was looking for about swapping the two bellhousings but could one or both you give me advice on to rebuild or go with used or is that something tbd by a trans rebuilder after looking at the trans.I have a fsm and have looked at the overhaul, doesnt look to bad.

[NISTECH]

It will likely becheaper to go with a good used trans then to rebuild your old one since the cost of the parts needed to rebuild the trans will likely out weight the cost of the used one with a warranty.

[s13sr20chris]

yeah, the parts are not cheap. my advice, go used and take the other apart in your spare time. if you still feel like rebuilding it, at least you have a spare.

[newbe40]

One more question I just did the j30 vlsd swap in my 95 240sx se and it has 392 gears in it my question is, is there a way to correct the speed sensor by changing the gear for it ?

[s13sr20chris]

j30 diff has 3.92 ring and pinion? i did not know that. you can order differently sized speedo pinions from nissan motorsport.